Support for concrete forms



Nov. 13, 1945. Y F. D. PARMENTER SUPPORT FOR CONCRETE FORMS Filed Aug. 28, 1943 U11 uehlor v F .D. Par wew-nhv T a @A 1 which Patented Nov, 13 1945 'j ij-I 'j 'i SUPPORT FOR-OONCEETEFORMS J Frank D. larmenter, Toronto, ntario, Canada a? V Application August 28, 194s;seia1i1 e. 506L401 j Claims. (01. 25 1s1) This invention relates tosup'ports for; concrete form The object of this invention is to improve previously known constructions, particularly the' construction 'fshown by prior United states Patent 2,235 442end others of a similar ind; r l Among other difliculties in the use of such supports hasbeen the difiiculty of satisfactorily and readily adjusting the length of the supports and clamping them totheforrns; removing the spacingniernbers after the. concrete has set; and providing suitableseeuring means for four-sided or round'f ormssuohas are used for making beams and tiers; Thesefdifiicmties and others which will; hereafter be referred. tohave been solved, and the object Of this invention achieved by means of certain features of construction which arehereinafter fully described andillustrated, by way of example; in the accompanying drawing in Figure .1 is a view of two supports showing them secured to the 'walls of a form, the tie rod being broken away and one support being shown in plan view and theother support in section;

FigureZ is a plan vie'wfofi a modifiedforrn of the support; j V i 7 FigureS a side elevation ofthe form of support 1. 9W n" l ure;.

Figure 3A a1 ragmentary perspective view showing 'a, modi'iic'ationv of the support shown in uresZ'and.3;"- f Q j 1 gur'e 4' a side elevation on anfenlarged scale o thefrusto -conical spacerLshown in Figures "Figure 5 elyf w .ei fiar dused ale. f a concrete form showingfiny cluster"conneetor; 6. @PQISPBCPW? YiQWQn an enlarged scale .bith .c u r nn cimi Figurefl a. perspective view Lon an. enlarged s.oale.. of. the .corner 1 adapter shownin Figure 5.

Figure .8 a plan .view the support adapted for meter. at formihaving-converging walls; and a 1Figure'-9'a perspective'view of a roughening tool forrecesses in-the concrete; I '4 --In;the different figures corresponding numbers referv to;corresponding'parts; I Thefsupportfextendsbetween the walls ofthe form Fandcons'istso'f a tie rod 2 havinginternally threaded enlarged ends adapted to receive bolts 3. Screwed-6r fitted over'the said enlarged ends are trustqconigal spacer collars 4 adapted tobea'r against the inside of the walls of'the form I.

The other ends of the bolts 3 are knurled at 5 whereby. the, bolts maybeseiewed into the. tie rod spindlel bymeansof pliers or; a.w1'ench .i

jfTosecure the wallsof the form firmly in the required. spaced-apart position 1001; nuts 16, .6 .are threadedj.,;on the bolts 3 and tightened. .d n against plates .1; l which extend over a .b' .By.-tightening thefnutsfi. against theplate w ns er. the ram. .I' r clamped 'betwe nutsand the spacer l. H .L- A modifiedform of plate i shown in Figures 2 and; .inwhibh'the plate takes the r orm ora tra I having .afsub'stantially right angle bend therein whereby. one end is, formed .to' pass around and s id . be .securedfto abatten secured toltheform or. .to

some otherfpart .of the f.0,1im by Ineans of. nails llljpassing.throughjholes intheistrap. .The, other end of the strap, which .is me eof resilient metal, extends ;ul vvai'dly.at a ,sli'ght angle. and. then is bent. bwni t. an acute an e; I t e. u wardl ben. tion is a li'ole .adaptd tolrecjeive the. bolt 3- ahdin thebent downend portion. there is a slot through whichthejbolt extends and wn eniron r prongsfone on either side ,ofjthebolt adaptedjto .be pressedordriVen into the side. of. the'batten when the .lock nut is tightened. The strap iSco venieritly and. easily attached byrneans'fof. nail or',' screwsas shown, and can be easily ren 'oyed, i 'ih l liiitle'o no damage to. the, tenor other support provided. .This form. of uppo t .15.??? tioul'arl adaptablefidthe building of shallow wallsor. thin concr te. walls, whichexereise. small weight strainand enable lightform construetion with corresponding econolnmto be. used. 7

ln Fig'urelsA is'shown a, modified form of strap 1". Insteadlofthebifurcated end shown in Figures 2 and'3, a slot isprovidedfor the passage. of the bolt and the end lies flat against the.. b,atten and maybesecured thereto by nails .to the b t en.

The. plate 'l' is provided with a boss I l formed around the hole whic his formed in the plate for with the lower surface. it the n'ut.ur1t ;1 theni is tightened down su'ffieiently re-press down" the upwardly extending resilient end portion of said strap 1'. An adapter plate 13 may be inserted between the strap and the nut having a substantially semi-cylindrical boss ll forming a swivel connection with the concave under surface of the nut. By means of this swivel connection perfect contact between the strap and the adapter plate is assured.

When the concrete has been poured and set, the bolts 3 are unscrewed and removed and the forms I are taken down and the frusto-conical spacers or collars 4 are removed, leaving recesses which are filled up with concrete in order to close the ends of the tie rods which are left in the concrete. As shown in Figure 4 the interior of the spacer is grooved or slotted so that a suitable instrument may be inserted to unscrew it from the end of the tie rod, or to pull it off in the event that it is merely slipp d over theend of the tie rod as in some constructions. It has heretofore been proposed to roughen the external surface of a spacer by means of threads or longitudinal grooves so that when the spacer has been removed the internal surface of the recess which is left in the concrete will be roughened and affords a gripping surface to retain or anchor the additional concrete or cement with which the recess is filled. However, both these and other similar constructions have the great disadvantags that they make it difficult if not impossible to remove the frusto-conical spacer, particularly if the spacer is threaded on to the end of the tie rod and requires to be unscrewed. According to the present invention as shown particularly in Figure 4, the sides of the spacer member are of stepped formation, the walls of each step tapering outwardly towards the base of said spacer member. There is thus no straight walled part nor undercut part to make the removal of the member difficult, and when the member has been removed, the walls of the recess left in the concrete are of a corresponding form, having a plurality of ridges formed therein. These ridges assistin anchoring the filler in the recess, and this efiect can be improved by means of a longitudinall ribbed frusto-conical tool l2 such as illustrated in Figure 9 which may be inserted in the recess and struck with a hammer or other tool so as to break or cut the ridges and make a more uneven surface and thus form a better bond between the filler and the concrete of the form.

For forming beams, tiers, columns, or corners of concrete walls, a number of tie rods may be connected together as illustrated in Figures 5 to 7 inclusive by means of acluster connector l5 which may be of flat, circular or: multi-sided construction having a plurality of threaded holes I5 thereinadapted to receive the threaded ends of tie rods 2. A number of these cluster connectors may be used one above the other and a reinforcing rod, pipe, wire or cable, if desired, may be passed down through holes |5 in the middle thereof, or the cluster connectors may be supported one above the other by a rod or pipe passing through holes l5".

The form may be fiat sided as shown in the drawing or round or other form, and an adapter may be used for those tie rods which are secured to an uneven surface. In Figure 7, is shown an adapter NS for a corner, this being similar to the late 1. The hole through the adapter ltls provided with a boss l6 having a convex upper surface shaped and formed to conform to a concave inner surface on a lock nut 6, similar to the construction shown in Figure 1.

It is thought that the construction and use of the invention will be apparent from the above description of the various parts and their purpose, It is to be understood that the form of my invention herewith shown and described, is to be taken as a preferred example of the same, and that various changes in the shape, size and arrangement of parts may be resorted to, without departing from the spirit of my invention, or the scope of the subjoined claims.

What I claim as my invention is:

1. A supportfor concrete forms, including a tie rod, a bolt, connected to the tie rod, a nut on the bolt, and a strap against which the nut is screwed, said strap being adapted to be secured to the form and having a resilient part provided with a hole through which the bolt passes and a prong. extending inwardly at an acute angle to the resilient part and adapted to be driven into the form when the nut is tightened.

2. A support for concrete forms, including a tie rod, a bolt, connected to the tie rod, a nut on the bolt, and a strap against which the 'nut is screwed, said strap being adapted to be secured to the form and having an upwardly extending resilient part provided with a hole through which the bolt passes and prongs extending inwardly one on each side of the bolt at an acute angle to the resilient part and adapted to be driven into the form when the nut is tightened,

3. A support for concrete forms, including a tie rod, a bolt, connected to the tie rod, a nut on the bolt, and a strap against which the nut is screwed, said strap having one end formed to pass around and be secured to a batten on the form and having a resilient part provided with a hole through which the bolt passes and a prong extending inwardly at an acute angle to the resilient part and adapted to .be driven into the form when the nut is'tightened.

4. A support for concrete forms, including tie rod, a boltconnected to the tierod, a nut on the bolt, and a strap against which the nut may be screwed, said strap having a part adapted to be secured to the form and having a part extending inwardly at an acute angle to said firs'tmentioned part, said last mentioned part being adapted to be secured to a part of the form-extending at right angles to the part of the frame to which the first mentioned part of the strap is secured, said first mentioned part of-thestrap being provided with a hole adjacent the angularly extending part through which the bolt extends, and said angularly extending part having an opening therein adapted to receive the bolt when the strap is secured to the form.

5. A support for concrete forms, including a tie rod, a bolt connected to the tie rod, a nut on the bolt, and a strap against which the nut may be screwed, said strap having a part adapted to be secured to the form, a part extending at substantially right angles thereto, and a part extending at an acute angle thereto, whereby the strap may embrace a part of the frame with the end of the last mentioned part engaging the side of the part of the frame which the strap embraces, said strap being provided with a hole adjacent the last mentioned part through which the bolt extends, and said last mentioned part having an opening therein adapted to receive the bolt when the strap is secured to the form.

FRANK D. PARMENI'ER. 

